Cap for endoscope

Abstract

A cap for an endoscope includes: a cylindrical portion formed so that a distal end thereof protrudes forwardly from a distal end of an insertion portion of an endoscope; and a suction path that is connected to a suction device, and that communicates with an internal surface of the cylindrical portion.

1. A cap for an endoscope which is allowed to be fitted onto a distal end of an insertion portion of the endoscope, the cap comprising:
 a cylindrical portion formed so that a distal end thereof protrudes forwardly from the distal end of the insertion portion in a state where the cap is fitted onto the distal end of the insertion portion; 
 a first opening adapted to be pressed onto a biomedical tissue surface, which is formed at the distal end of the cylindrical portion; 
 a suction path that is connectable to a suction device; 
 an inner cylindrical portion formed inside the cylindrical portion so that a distal end thereof protrudes forwardly from the distal end of the insertion portion; and 
 a second opening formed at the distal end of the inner cylindrical portion so as to face in the same direction of the first opening; wherein 
 the length of the inner cylindrical portion protruding from the distal end of the insertion portion is shorter than the length of the cylindrical portion protruding from the distal end of the insertion portion, and 
 a gap is arranged between the inside surface of the cylindrical portion and the outside surface of the inner cylindrical portion; and 
 the suction path directly communicates with only the gap at a portion closer to a proximal end of the insertion portion than the second opening of the inner cylindrical portion. 
 
   
   
     2. The cap according to  claim 1 , wherein the suction path is connectable to a suction channel that is provided in the insertion portion of the endoscope. 
   
   
     3. The cap according to  claim 1 , wherein at least the cylindrical portion is made of a transparent material. 
   
   
     4. The cap according to  claim 1 , wherein the cap is removably fitted onto the distal end of the insertion portion. 
   
   
     5. The cap according to  claim 1 ,
 wherein the distal end of the cylindrical member fitted onto the insertion portion is pressed onto the biomedical tissue surface, and thereafter 
 a biological fluid inside the cylindrical member is suctioned via the gap and the suction path while performing a treatment procedure by the endoscope. 
 
   
   
     6. The cap according to  claim 1 , wherein the suction path is connected to the suction device via a tube member that is arranged outside the insertion portion.